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ReviewHigh

CVE-2019-12676

Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance, adaptive security appliance software

A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software improperly parses certain options in OSPF link-state advertisement (LSA) type 11 packets. An attacker could exploit this vulnerability by sending a crafted LSA type 11 OSPF packet to an affected device. A successful exploit could...

CVSS
7.4
EPSS
0.51%
41.3% percentile
CISA KEV
Not listed
Published
2019.10.03
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.51%
Technical severityCVSS 7.4

Vulnerability overview

A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software improperly parses certain options in OSPF link-state advertisement (LSA) type 11 packets. An attacker could exploit this vulnerability by sending a crafted LSA type 11 OSPF packet to an affected device. A successful exploit could...

Affected product and versions

Product
Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance, adaptive security appliance software
Affected versions
>= unspecified, < 9.6.4.34, >= 9.7 < 9.8.4.8, >= 9.9 < 9.9.2.59, >= 9.10 < 9.10.1.27, >= 9.12 < 9.12.2.1, < 6.3.0.4, >= 6.4.0 < 6.4.0.4
Fixed versions
9.6.4.34, 9.8.4.8, 9.9.2.59, 9.10.1.27, 9.12.2.1, 6.3.0.4, 6.4.0.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Cisco Cisco Adaptive Security Appliance (ASA) Software, adaptive security appliance, adaptive security appliance software and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
CWE-20